36
1ZSE 5492-118 en, Rev. 4
fm_00210
TC_00262 fm_00208
5.4 Connection to the oil conservator
NOTE: If oil lling is done under vaccum without oil conservator, this section is carried
out after oil lling. See Fig. 32.
Remove the transport cover on the tube bend. Make sure the O-ring is in place and connect
the pipe to the oil conservator. Tighten the nuts.
CAUTION
In case where the conservator is common for the transformer and the on-load tap-changer,
an oil lter must be placed in the pipe between the on-load tap-changer and the conserva-
tor.
Oil lter with housing can be ordered from ABBon the ”Ordering data” sheet.
5.5 Before operation
1. Check that the on-load tap-changer and the motor-drive mechanism have the same
indicated position and that the key position of the on-load tap-changer bevel gear is in
accordance to Fig. 30.
2. Remove the locking device of the motor-drive mechanism (if not already done). See
Fig.33.
Fig. 33. Locking device of motor-drive mechanism.
5 Final assembly
O-ring 44.2x5.7
Turnable ange
Ø 75
Ø 85
Ø 110
Ø 14 (4x)
Ø 11 (4x)
BUE
BUL
Locking device
Fig. 32.
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